Safety & Codes
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Official standard. This page transcribes or closely follows an official Skilled Trades Ontario, Electrical Safety Authority, or IATSE document. It is provided for reference and convenience only — it is not the authoritative record. Always confirm current requirements against the original source or Skilled Trades Ontario.
Temporary power distribution and lighting for film, television, live performance, trade shows, and events in Ontario is governed by the Ontario Electrical Safety Code (OESC) and, specifically for this industry, by ESA SPEC-003: Television, Film, Live Performance and Event Electrical Guidelines.
- Source: ESA SPEC-003 R7, full document(link)
ESA SPEC-003 is a joint publication of the Electrical Safety Authority (ESA) — Ontario's designated electrical safety regulator under Ontario Regulation 89/99 — and the Entertainment Electrical Safety Committee of Ontario (EESCO). It is explicitly a best-practice guideline, not a replacement for the OESC: "Omission herein of any requirements presently in the OESC does not in any way affect the OESC."
Permits and incident reporting
- The OESC (Rules 2-004 and 44-100) requires a wiring notification/permit for any temporary wiring distribution system. Productions/events must file with ESA within 48 hours prior to any electrical activity, and post the permit number visibly near the central power distribution point.
- Any electrical accident or incident must be reported to ESA within 48 hours, and the scene must not be disturbed except as needed for safety or continuity of service.
Who's allowed to do the work
Only a certified Entertainment Industry Power Technician (269E) or a holder of a valid Construction and Maintenance Electrician (309A) Certificate of Qualification may design, implement, monitor, and disconnect single-pin and single-pin-based distribution systems. Supervised registered apprentices may handle, connect, and disconnect single-pin distribution under that person's direction.
Selected general practices
- All electrical equipment (including cordsets) must bear an approval or certification mark, or be field-approved.
- A log must be kept of all electrical maintenance performed during a show, event, or production; field-repaired equipment must be tagged and tested before reuse.
- Power should be de-energized during set-up/reconfiguration where practicable, and locked out/tagged when unattended.
- Class A GFCIs are required on circuits feeding utilization equipment (audio racks, luminaires, kitchen units, porta-potties, power tools, wash stations) in wet/damp locations, within 3 m of standing water, or where snow/salt/slush is likely — with specific exceptions (exit lighting, fire/smoke/CO alarm circuits, fire pumps).
- Non-current-carrying metallic parts must be bonded to ground (OESC Section 10).
- A non-meltable, non-combustible safety cable/chain is required on all suspended luminaires, in addition to the primary rigging attachment.
- HMI, xenon, and similar discharge sources require extra precautions: no contact with the unit/ballast when striking, clearance in damp/rainy conditions (increased arcing risk), awareness of UV output, and full power-down/cool-down before re-lamping.
- Source: ESA SPEC-003 R7, Sections 2.1–2.4, pp.11–16
Power sources
Recognized source types: diesel/gasoline/gaseous-fuel engine-driven generator sets, utility ("house"/"shore" power), and storage batteries. Common Canadian voltage/distribution configurations include 120 V single phase two-wire, 120/240 V single phase three-wire, 120/208 V three-phase four-wire (Wye), and 347/600 V three-phase four-wire (Wye), among others.
All generator installations using single conductor cable and/or downstream overcurrent devices must be installed per the OESC/SPEC, have overcurrent protection on any ungrounded conductor, be grounded, and be inspected by ESA before use.
- Source: ESA SPEC-003 R7, Section 3, pp.16–17
Glossary
A few load-bearing terms from ESA SPEC-003's definitions section (see the full document for the complete list):
- Single pin
- A single-conductor plug-in locking-type connector, rated up to 400 A (e.g. CAM-LOK). Also used more broadly to refer to the whole distribution method built on this connector type.
- Multiple Connection Device
- A single-pin splitting device with 1 line and 3+ load connections per conductor (e.g. a "Crowfoot"/"Three-fer", "High Five", or "Tee Tower").
- Electrical Distribution Box (Distro)
- A device permitting branching of power to two or more downstream loads or distribution boxes, typically single-pin, Joy, or pin-and-sleeve connectors with overcurrent protection.
- Practical
- A working "on-set" luminaire, standard or custom, powered from the portable distribution system; must be bonded to ground unless an approved two-wire fixture.
- Ground-proving device
- A device designed to verify system grounding — used to prove (not just establish) a ground, per Skill 5357.03.
- Dual Circuit Fed Receptacle
- A duplex receptacle (or two receptacles in one box) fed from two separate sources, used on sets to supply both line voltage and dimmed voltage to the same device — requires a specific bonding, labelling, and isolation procedure (SPEC-003 Appendix H).
- Source: ESA SPEC-003 R7, Section 1, pp.4–10
See Tools & Equipment for a growing, community-maintained reference on the connectors and gear these terms describe.